The advisability of bringing electronic devices, specifically mobile telephones, into high-temperature environments such as saunas is a frequent query. Mobile telephones are constructed with components sensitive to both extreme heat and humidity. The operational temperature range specified by manufacturers is typically much lower than that found within a sauna, which can reach temperatures exceeding 80 degrees Celsius (176 degrees Fahrenheit).
Elevated temperatures and humidity can induce a range of adverse effects on electronic devices. These include, but are not limited to, overheating, battery degradation, condensation damage to internal circuitry, and potential data loss. The long-term consequences of repeated exposure to such conditions may result in diminished performance, shortened lifespan, and eventual device failure. The materials used in the construction of smartphones, such as adhesives and plastics, can also be negatively affected, leading to structural damage.